Diploicia christinae sp. nov. (Ascomycota: Caliciales: Caliciaceae), an overlooked lichen species from Bermuda

A crustose lichen species new to science – overlooked by previous workers – is formally described. This new species, Diploicia christinae, differs from all other species in the genus by its narrow lobes (< 1 mm) and its effuse soralia that contain consistently white soredia. Its secondary chemistry, and lack of apothecia and pycnidia, are also diagnostic. The new species is known only from the Bermuda archipelago.